fetchd Feature request: Get stack trace from returned contract errors

Prerequisites

[X] I checked the documentation and made sure this feature does not already exist.
[X] I checked the existing issues to make sure this feature has not already been requested.
[X] I have read the code of conduct before creating this issue.

Problem

When my contracts return an error to cosmpy, then I often see the error message but have no idea where it arose (not even which contract it came from - as it could have come from a contract calling another contract etc.)